Another Discrete R2R Multibit Dac that can do DSD, again from the land of the Great Wall

For multiple stacked implementation of R2R chip, do take a look at this website,  www.dddac.com . It allow you to stack as many R2R as you like and it comes in diy modules. Some basic knowledge of electrical and soldering skills needed though. However,  from the diy community, the results from this dac are overwhelming,  the more stack you use, as much as 16 (4 levels high)  the better the sound. The audio performance always improve by using more and more R2R chips! 
-phil